Its definitely a 1/5 or 1/6 scale gasser and for the price its an excellent deal. I'm not an expert on them, but it looks like an older FG, Harm, or maybe a Carson which is a clone but better than the chinese clones. I see the missing gear, that shouldn't be hard to find online. It looks like it does have a "can" type exhaust, but is missing the pipe that runs to the back.